Track a script argument as a targets dependency

Use as the script, pre_script, or post_script argument of tar_target_py()/tar_target_jl()/tar_target_rs() (and their _raw forms) instead of a literal path string, to make that step re-run whenever the script file changes. name is the name of an upstream targets target (typically one created with format = "file" tracking the script file), and its value (the file path) is substituted in when the pipeline runs.

Usage

tar_target_path(name)

Arguments

name

Character string, the name of an upstream target whose value is the script's file path (e.g. a tar_target(..., format = "file")).

Value

An object marking name for dependency-wiring by the tar_target_* constructors.

Details

This mirrors how inputs = c(x = "some_target") already wires an upstream target in by name: the target's name is given as a string, and the constructor turns it into a real dependency. A plain string passed directly as script/pre_script/post_script keeps meaning what it always has (an untracked literal path), so existing pipelines are unaffected.

See also

tar_target_py(), tar_target_jl(), tar_target_rs()

Examples

if (FALSE) { # \dontrun{
list(
  tar_target(mofaflex_pyscript, "python/mofaflex_fit_step.py", format = "file"),
  tar_target_py(
    name = mofaflex,
    script = tar_target_path("mofaflex_pyscript"),  # re-runs when the file changes
    pre_script = "scripts/mofaflex_pre.R",           # untracked literal path
    retrieve = "result"
  )
)
} # }